<?php

$homeConf = $_SERVER['CONTEXT_DOCUMENT_ROOT'].'/../.config/hedera-web/config.php';

if (file_exists ($homeConf))
	require_once ($homeConf);
else
	require_once ('/etc/hedera-web/config.php');

require_once ('php/db/db.php');
require_once ('php/web/auth.php');

function checkToken ($token)
{
	return preg_match ('/^[\w\-]+$/', $token);
}

function ifNull ($map, $key)
{
	return isset ($map[$key]) ? $map[$key] : NULL;
}

class Hedera
{
	static $sysConn;
	static $conn;
	static $newAccess = FALSE;

	static function init ()
	{
		global $conf;
	
		session_start ();

		$sysConn = new DbConn ();
		$sysConn->open (
			 'p:'. $conf['db']['host']
			,$conf['db']['user']
			,base64_decode ($conf['db']['pass'])
			,$conf['db']['name']
		);


		self::$sysConn = $sysConn;
		self::$conn = new DbConn ();
		
		// Setting the locale

		if (!isset ($_COOKIE['hedera_lang']) || $_COOKIE['hedera_lang'] == '')
		{
			if ($sysConn->isOpen () && isset ($_SERVER['HTTP_ACCEPT_LANGUAGE']))
			{
				$query = 'SELECT COUNT(*) FROM language WHERE code = %s AND active != FALSE';
				$regexp = '/([a-z]{1,4})(?:-[a-z]{1,4})?\s*(?:;\s*q\s*=\s*(?:1|0\.[0-9]+))?,?/i';

				preg_match_all ($regexp, $_SERVER['HTTP_ACCEPT_LANGUAGE'], $languages);

				foreach ($languages[1] as $lang)
				if ($sysConn->getValue ($query, $lang))
				{
					$_SESSION['lang'] = $lang;
					break;
				}
			}

			if (!isset ($_SESSION['lang']))
				$_SESSION['lang'] = $conf['defaultLang'];

			setcookie ('hedera_lang', $_SESSION['lang']);
		}
		else
			$_SESSION['lang'] = $_COOKIE['hedera_lang'];

		if (!$sysConn->isOpen ())
			return;

		// Setting the version

		$_SESSION['version'] = $sysConn->getValue ('SELECT version FROM version LIMIT 1');
		
		// Registering the visit

		if (!isset ($_COOKIE['PHPSESSID'])
		|| isset ($_SESSION['access'])
		|| isset ($_SESSION['skipVisit']))
			return;

		$agent = $_SERVER['HTTP_USER_AGENT'];
		$browser = get_browser ($agent, TRUE);
		
		if (isset ($browser['crawler']) && $browser['crawler'])
		{
			$_SESSION['skipVisit'] = TRUE;
			return;
		}

		if (isset ($_SERVER['REMOTE_ADDR']))
			$ip = ip2long ($_SERVER['REMOTE_ADDR']);

		$row = $sysConn->getRow (
			'CALL visit_register (%s, %s, %s, %s, %s, %s, %s, %s, %s)'
			,ifNull ($_COOKIE, 'hedera_visit')
			,ifNull ($browser, 'platform')
			,ifNull ($browser, 'browser') 
			,ifNull ($browser, 'version')
			,ifNull ($browser, 'javascript')
			,ifNull ($browser, 'cookies')
			,isset ($agent) ? $agent : NULL
			,isset ($ip) ? $ip : NULL
			,ifNull ($_SERVER, 'HTTP_REFERER')
		);

		if (isset ($row['access']))
		{
			setcookie ('hedera_visit', $row['visit'], time () + 365*60*60*24);
			$_SESSION['access'] = $row['access'];
			self::$newAccess = TRUE;
		}
		else
			$_SESSION['skipVisit'] = TRUE;
	}

	static function deinit ()
	{
		self::$sysConn->query (
			'UPDATE user_session SET connection_id = NULL WHERE ssid = %s'
			,session_id ()
		);
	}

	static function login ()
	{
		$wasLoged = isset ($_SESSION['user']);
		$success = Auth::login (self::$conn);
		
		if ($success)
		{
			$row = self::$conn->getRow (
				'SELECT account.user_get_id () user, CONNECTION_ID() conn');
			
			if (!$wasLoged)
				unset ($_SESSION['visitUser']);
		}
		else
			$row = NULL;

		// Registering the user access

		if (isset ($_SESSION['access']))
		{
			$_SESSION['visitUser'] = self::$sysConn->getValue (
				'CALL visit_user (%s, %s, %s, %s, %s)'
				,$_SESSION['access']
				,ifNull ($_SESSION, 'visitUser')
				,ifNull ($row, 'user')
				,ifNull ($row, 'conn')
				,session_id ()
			);
		
			if (!isset ($_SESSION['visitUnknown']) && !$success)
				$_SESSION['visitUnknown'] = $_SESSION['visitUser'];
		}

		return $success;
	}
	
	static function logout ()
	{
		self::$sysConn->query (
			'DELETE FROM user_session WHERE ssid = %s'
			,session_id ()
		);

		$_SESSION['visitUser'] = ifNull ($_SESSION, 'visitUnknown');
		Auth::logout (self::$conn);
	}
}

?>